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x86: Add rdpmcl()

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Add a version of rdpmc() that directly reads into a u64

Signed-off-by: Andi Kleen <[email protected]>
Signed-off-by: Peter Zijlstra <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>
This commit is contained in:
Andi Kleen 2012-06-05 17:56:50 -07:00 • committed by Ingo Molnar
commit 1ff4d58a19
2 changed files with 4 additions and 0 deletions
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2
arch/x86/include/asm/msr.h
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@ -237,6 +237,8 @@ do { \
(high) = (u32)(_l >> 32); \
} while (0)
#define rdpmcl(counter, val) ((val) = native_read_pmc(counter))
#define rdtscp(low, high, aux) \
do { \
unsigned long long _val = native_read_tscp(&(aux)); \

2
arch/x86/include/asm/paravirt.h
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@ -252,6 +252,8 @@ do { \
high = _l >> 32; \
} while (0)
#define rdpmcl(counter, val) ((val) = paravirt_read_pmc(counter))
static inline unsigned long long paravirt_rdtscp(unsigned int *aux)
{
return PVOP_CALL1(u64, pv_cpu_ops.read_tscp, aux);